Francis robno estlow



(No Model.)

P. R. ESTLOW.

DEVICE FOR CHANGING REOIPROCATING INTO ROTARY'MOTION.

N PETERS. Phulmlilhogmpher. Washmgtom u c.

UNITED STATES PATENT OFFICE.

FRANCIS ROBNO ESTLOW. OF BARNEGAT, NEW JERSEY.

DEVICE FOR CHANGING RECI PROCATING INTO ROTARY MOTION.

SPECIFICATION forming part'of Letters Patent No. 367,281. dated Ju1y,26, 1887.

Application filed April 26, F387. Serial No. 236,213. (No model.)

To all whom it may concern:

Be it know u that I, FRANCIS RoBNo ESTLOW, a citizen of the United States,residing at Barnegat, in the county of Ocean and State of New Jersey, have invented a new and useful Improvement in Machines for Changing Reciprocating into Rotary Motion, of which the following is a specification.

My invention relates to an improvement in machines for changing reciprocating into r0 tary motion; and it consists in the peculiar construction and combination of devices, that will be more fully set forth hereinafter, and particularly pointed out in the claims.

In the drawings, Figurel is a side elevation of a machine embodying my improvements. Fig. 2 is a vertical transverse sectional view of the same, taken on the line 00 wof Fig. 1. Fig. 3 is a top plan view on the line y y of Fig. 1.

A represents a supporting frame, on which is journaled atransverse shaft, B. To one end of the said shaft is secured a fly-wheel, O, and to the other end thereof is secured'a spurwheel, D. 0

E represents a longitudinal frame which is secured on one side of the frame A. The said frame E is provided on opposite sides with a longitudinally-movable slide-bar, L,.which is guided in keepers M and is provided with an inclined slot, N, through which the upper transverse rod K extends. The slide-bar L is provided at one end with a handle, 0, by

oted to the cross-head above the rod 1?, and is provided on its under side for a suitable distance with rack-teeth U, adapted to engage the upper side of the gear-wheel D. The upper side of this rack-bar is providedwith laterally-projecting horizontal flanges V, at the ends of which are openings or notches \V.

X represents a bar which has one end pivoted to the crosshead at a point below the rod T. The said bar is provided on its upper side for a suitable distance throughout its length with aseries of rack-teeth,Y, which are adapted to engage the under side of the gear-wheel D; and the said rack-bar X is provided on its lower side with laterally-projecting longitudinal flanges Z, and has vertical openings or notches A formed at the end of the said flanges.

B represents a vertical bar which connects the outer end of the rack bars T and X together, and the ends of the said vertical bar project above and below the ends of the rackbars, as shown. On the upper side of the rackbar T, at the inner end thereof,' is secured an nected to the upper end of the bar B and inclines downward and rearward to the rack-bar T, and is arranged at the same inclination with the spring-arm T. p

E represents a forwardly and downwardly inclined spring; arm which has one end secured to the under side of the rack-bar X, near the rear end of the latter, and F represents a similarly-inclined spring-arm which is attached to the lower end of the bar 13 and bears against theunder side of the rack-bar From the opposing sides of the vertical bars F project horizontal inwardly-extending studs G, and at a suitable distance below the studs G are similar studs, H. V

The operation of my invention is as follows:

When it .is designed to rotate the wheel 0 in the direction indicated by the arrow in Fig. 1,

springs E and F. When the piston-rod is at the reverse end of its stroke, the openings \V and A at the front end of the rack-bars are in vertical line with the studs G and H, and the spring-arm D bears under the bolt K, and thereby forces the rack-barl into engagement with the upper side of the spur-wheel, and the rack-bar X is lowered out of engagement with the under side of the spur-wheel, the studs G are above the upper side of the flanges V of" the rack bar T, and the studs H are just above the upper side of the flanges Z of the rack-bar X. lVhen the rod 1 is moved forward, forward motion is imparted to the crosshead 11-, and thereby the rack-bars are urged forward. Inasmuch as the upper rack-bar, T, is in engagement with the upper sides of the spurqvheel, the latter, the shaft, and the wheel 0 are caused to turn in the direction indicated by the arrow in Fig. 1. As the rack-bars move forward the spring D is moved beyond and disengages the belt or rod K, and when the rodT has nearly completed a strokethe springarm '1" is caused to engage the upper side of the said cross bar or bolt K, and by the time that the rod has completed its stroke the tension of thespring-arm Tis so great that when the notches \V and A at the rear ends of the rack-bars align with the studs G and II the said spring G moves the rack-bar X upward, so as to disengage its teeth from the upper side of the spur-wheel, and the lower rack-bar, X, is also moved upward, so as to bring its teeth in engagement with the lower side of the spur-wheel, both rack-bars having their inner ends raised sufficiently to cause the rear notches \V and A to pass above the studs G and H, and thereby cause the said studs to align with the lower sides of the rackbar. On the reverse stroke it will be seen that the lower rackbar, by engaging the lower side of the gear-wheel, keeps the same rotating in the same direction, and thus continuous rotary motion is imparted to the shaft by both the forward and backward stroke of the rod 1. \Vhen the rod completes its rearward stroke, the spring D, by bearing under the cross rod or bolt K, depresses the outer ends of the rackbars to their initial position previously described. If it is desired to reverse the rotation of the shaft, this may be accomplished by drawing the slide-bar.L rearward and thereby causing the inclined slot thereof to raise the bars G, so as to move the bolt K above the path of the spring-arms T and D and raise the cross rod or bolt K into the path of the springs E and F, in which position the under side of the spur-wheel will be engaged by the lower rack -bar at the forward stroke, and the upper side thereof will be engaged by the upper rack-bar at the reverse stroke, and thus the shaft will be caused to rotate in the opposite direction to that indicated by the arrow in Fig. l, as will be very readily understood.

Having thus described my invention, I claim 1. lhe combination of the shaft having the spur-wheel, the reciprocating cross-head having the raek-bars T and X, adapted to engage the upper and lower sides of the spur-wheels successively at each alternate stroke of the cross-head, the cross-pin K, and the springarms attached to one of the rack-bars and adapted to engage the said pin or belt at the ends of the stroke, the said spring-arms being inclined in the same direction, and thereby adapted to alternately engage opposite sides of the pin or bolt and raise and lower the rack bars, for the purpose set forth, substantially as described.

2. The combination of the shaft having the spur-wheel, the reciprocating cross-head, the rack-bars pivoted thereto and havingthe rackteeth 011 their opposing sides adapted to alternately engage the upper and lower sides of the spurwheel, the bar B, connecting the outer ends of the rack-bars, the springs T and D, inclined upwardly and forwardly and arranged 011 the upper side of the upper rack-bar, at the ends thereof, the springs E and F, inclined downwardly and forwardly and arranged on the lower side of the lower rack-bar, at the ends thereof, and the vertical movable frame I, having the belt or pins K and K and the slide-rod to operate the said vertical frame, for the purpose set forth, substantially as described.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in presence of two witnesses.

FRANCIS ROBNO ESTLOV.

\Vitnesscs:

J osnru L. IIIGGINS, .lilflRME G. ERRIOKSON. 

